This material is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
If you buy
a class skill, your character gets 1 rank (equal to a +1 bonus on checks with
that skill) for each skill point. If you buy other classes' skills (cross-class
skills), you get 1/2 rank per skill point.
rank in a class skill is your character level + 3.
rank in a cross-class skill is one-half of this number (do not round up or down).
To make a skill check,
roll: 1d20 + skill modifier (Skill modifier = skill rank + ability modifier
+ miscellaneous modifiers)
This roll works just like an attack roll or a saving throw- the higher the roll, the better. Either you're trying to match or exceed a certain Difficulty Class (DC), or you're trying to beat another character's check result.
A character's number of
ranks in a skill is based on how many skill points a character has invested
in a skill. Many skills can be used even if the character has no ranks in them;
doing this is called making an untrained skill check.
Ability Modifier: The
ability modifier used in a skill check is the modifier for the skill's key ability
(the ability associated with the skill's use). The key ability of each skill
is noted in its description.
Miscellaneous modifiers include racial bonuses, armor check penalties, and bonuses provided by feats, among others.
Each skill point you spend
on a class skill gets you 1 rank in that skill. Class skills are the skills
found on your character's class skill list. Each skill point you spend on a
cross-class skill gets your character 1/2 rank in that skill. Cross-class skills
are skills not found on your character's class skill list. (Half ranks do not
improve your skill check, but two 1/2 ranks make 1 rank.) You can't save skill
points to spend later.
The maximum rank in a class
skill is the character's level + 3. If it's a cross-class skill, the maximum
rank is half of that number (do not round up or down).
Regardless of whether a skill is purchased as a class skill or a cross-class skill, if it is a class skill for any of your classes, your maximum rank equals your total character level + 3.
When your character uses
a skill, you make a skill check to see how well he or she does. The higher the
result of the skill check, the better. Based on the circumstances, your result
must match or beat a particular number (a DC or the result of an opposed skill
check) for the check to be successful. The harder the task, the higher the number
you need to roll.
Circumstances can affect your check. A character who is free to work without distractions can make a careful attempt and avoid simple mistakes. A character who has lots of time can try over and over again, thereby assuring the best outcome. If others help, the character may succeed where otherwise he or she would fail.
A skill check takes into
account a character's training (skill rank), natural talent (ability modifier),
and luck (the die roll). It may also take into account his or her race's knack
for doing certain things (racial bonus) or what armor he or she is wearing (armor
check penalty), or a certain feat the character possesses, among other things.
To make a skill check, roll 1d20 and add your character's skill modifier for that skill. The skill modifier incorporates the character's ranks in that skill and the ability modifier for that skill's key ability, plus any other miscellaneous modifiers that may apply, including racial bonuses and armor check penalties. The higher the result, the better. Unlike with attack rolls and saving throws, a natural roll of 20 on the d20 is not an automatic success, and a natural roll of 1 is not an automatic failure.
Some checks are made against a Difficulty Class (DC). The DC is a number (set using the skill rules as a guideline) that you must score as a result on your skill check in order to succeed.
Difficulty Class Examples
|Difficulty (DC)||Example (Skill Used)|
|Very easy (0)||Notice something large in plain sight (Spot)|
|Easy (5)||Climb a knotted rope (Climb)|
|Average (10)||Hear an approaching guard (Listen)|
|Tough (15)||Rig a wagon wheel to fall off (Disable Device)|
|Challenging (20)||Swim in stormy water (Swim)|
|Formidable (25)||Open an average lock (Open Lock)|
|Heroic (30)||Leap across a 30-foot chasm (Jump)|
|Nearly impossible (40)||Track a squad of orcs across hard ground after 24 hours of rainfall (Survival)|
An opposed check is a check whose success or failure is determined by comparing the check result to another character's check result. In an opposed check, the higher result succeeds, while the lower result fails. In case of a tie, the higher skill modifier wins. If these scores are the same, roll again to break the tie.
|Example Opposed Checks|
|Task||Skill (Key Ability)||Opposing Skill (Key Ability)|
|Constitution someone||Bluff (Charisma)||Sense Motive (Wisdom)|
|Pretend to be someone else||Disguise (Charisma)||Spot (Wisdom)|
|Create a false map||Forgery (Intelligence)||Forgery (Intelligence)|
|Hide from someone||Hide (Dexterity)||Spot (Wisdom)|
|Make a bully back down||Intimidate (Charisma)||Special1|
|Sneak up on someone||Move Silently (Dexterity)||Listen (Wisdom)|
|Steal a coin pouch||Sleight of Hand (Dexterity)||Spot (Wisdom)|
|Tie a prisoner securely||Rope Use(Dexterity)||Escape Artist (Dexterity)|
1 An Intimidate check is opposed by the target's level check, not a skill check. See the Intimidate skill description for more information.
In general, you can try a skill check again if you fail, and you can keep trying indefinitely. Some skills, however, have consequences of failure that must be taken into account. A few skills are virtually useless once a check has failed on an attempt to accomplish a particular task. For most skills, when a character has succeeded once at a given task, additional successes are meaningless.
Generally, if your character
attempts to use a skill he or she does not possess, you make a skill check as
normal. The skill modifier doesn't have a skill rank added in because the character
has no ranks in the skill. Any other applicable modifiers, such as the modifier
for the skill's key ability, are applied to the check.
Many skills can be used only by someone who is trained in them.
Some situations may make
a skill easier or harder to use, resulting in a bonus or penalty to the skill
modifier for a skill check or a change to the DC of the skill check.
The chance of success can
be altered in four ways to take into account exceptional circumstances.
1. Give the skill user
a +2 circumstance bonus to represent conditions that improve performance, such
as having the perfect tool for the job, getting help from another character
(see Combining Skill Attempts), or possessing unusually accurate information.
2. Give the skill user
a -2 circumstance penalty to represent conditions that hamper performance, such
as being forced to use improvised tools or having misleading information.
3. Reduce the DC by 2 to
represent circumstances that make the task easier, such as having a friendly
audience or doing work that can be subpar.
4. Increase the DC by 2
to represent circumstances that make the task harder, such as having an uncooperative
audience or doing work that must be flawless.
Conditions that affect your character's ability to perform the skill change the skill modifier. Conditions that modify how well the character has to perform the skill to succeed change the DC. A bonus to the skill modifier and a reduction in the check's DC have the same result: They create a better chance of success. But they represent different circumstances, and sometimes that difference is important.
Time and Skill
Using a skill might take
a round, take no time, or take several rounds or even longer. Most skill uses
are standard actions, move actions, or full-round actions. Types of actions
define how long activities take to perform within the framework of a combat
round (6 seconds) and how movement is treated with respect to the activity.
Some skill checks are instant and represent reactions to an event, or are included
as part of an action.
These skill checks are not actions. Other skill checks represent part of movement.
A skill check represents
an attempt to accomplish some goal, usually while under some sort of time pressure
or distraction. Sometimes, though, a character can use a skill under more favorable
conditions and eliminate the luck factor.
Taking 10 When your character is not being threatened or distracted, you may choose to take 10. Instead of rolling 1d20 for the skill check, calculate your result as if you had rolled a 10. For many routine tasks, taking 10 makes them automatically successful.
Distractions or threats
(such as combat) make it impossible for a character to take 10. In most cases,
taking 10 is purely a safety measure -you know (or expect) that an average roll
will succeed but fear that a poor roll might fail, so you elect to settle for
the average roll (a 10). Taking 10 is especially useful in situations where
a particularly high roll wouldn't help.
Taking 20 When you have plenty of time (generally 2 minutes for a skill that can normally
be checked in 1 round, one full-round action, or one standard action), you are
faced with no threats or distractions, and the skill being attempted carries
no penalties for failure, you can take 20. In other words, eventually you will
get a 20 on 1d20 if you roll enough times. Instead of rolling 1d20 for the skill
check, just calculate your result as if you had rolled a 20.
Taking 20 means you are
trying until you get it right, and it assumes that you fail many times before
succeeding. Taking 20 takes twenty times as long as making a single check would
Since taking 20 assumes
that the character will fail many times before succeeding, if you did attempt
to take 20 on a skill that carries penalties for failure, your character would
automatically incur those penalties before he or she could complete the task.
Common "take 20" skills include Escape Artist, Open
Lock, and Search.
Ability Checks and Caster Level Checks: The normal take 10 and take 20 rules apply for ability checks. Neither rule applies to caster level checks.
When more than one character tries the same skill at the same time and for the same purpose, their efforts may overlap.
Often, several characters attempt some action and each succeeds or fails independently. The result of one character's Climb check does not influence the results of other characters Climb check.
You can help another character
achieve success on his or her skill check by making the same kind of skill check
in a cooperative effort. If you roll a 10 or higher on your check, the character
you are helping gets a +2 bonus to his or her check, as per the rule for favorable
conditions. (You can't take 10 on a skill check to aid another.) In many cases,
a character's help won't be beneficial, or only a limited number of characters
can help at once.
In cases where the skill restricts who can achieve certain results you can't aid another to grant a bonus to a task that your character couldn't achieve alone.
It's possible for a character to have two skills that work well together. In general, having 5 or more ranks in one skill gives the character a +2 bonus on skill checks with each of its synergistic skills, as noted in the skill description. In some cases, this bonus applies only to specific uses of the skill in question, and not to all checks. Some skills provide benefits on other checks made by a character, such as those checks required to use certain class features.
Sometimes a character tries
to do something to which no specific skill really applies. In these cases, you
make an ability check. An ability check is a roll of 1d20 plus the appropriate
ability modifier. Essentially, you're making an untrained skill check.
In some cases, an action is a straight test of one's ability with no luck involved. Just as you wouldn't make a height check to see who is taller, you don't make a Strength check to see who is stronger.
The Worlds of Mankind is owned and created by Mark John Goodwin
The text on this page is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.
System and the d20 System logo are trademarks of Wizards of
the Coast, Inc.
and are used according to the terms of the d20 System License version 6.0.
A copy of this License can be found at www.wizards.com/d20.